1. Department of Psychiatry and Biobehavioral Sciences, Semel Institute for Neuroscience and Human Behavior, University of California, Los Angeles
2. UCLA Center for HIV Identification, Prevention, and Treatment Services
3. Friends Research Institute, Inc.
4. Department of Epidemiology, Fielding School of Public Health, University of California, Los Angeles
5. Department of Social and Behavioral Sciences, Yale School of Public Health, Yale University
6. Department of Public Health, Rongxiang Xu College of Health and Human Services, California State University, Los Angeles